Has the lowest annual average temperature?
The University of Minnesota’s Cedar Creek Research Reserve contains all three of these habitats and as
a result is quite diverse in plant and animal species.
Cedar Creek contains more than 100 fields that
have been abandoned from agriculture. The time since abandonment ranges from 1927 to the present.
Fields last cultivated in the 1970s or more recently are dominated by more weedy species of grass such
as Kentucky Bluegrass, Quackgrass, and Crab Grass as well as forbs such as Ragweed and Horseweed.
Fields that were abandoned in the 1950s are now dominated by longer lived Little Bluestem Grass, and
many of these fields been invaded by White Pine from surrounding upland forests.
What are 2 biological traits that might be associated with species such as bluegrass or ragweed? (note I
am not asking for a term that would characterize these species) (2)
What are 2 biological traits that might be associated with white pine? (same note applies) (2)
In the space on the right, draw the logistic growth curve making
sure to label each axis and K and then indicate which region of the
plot you drew would most likely represent the population growth
pattern of bluegrass seen early in the successional process and
which region would most likely represent the population growth
pattern of white pine seen late in the successional process (4)
Which of the two species in the previous question would most
likely be affected by density-dependent factors? (2)
In mature Prairie communities, one of the most spectacular mid-
summer species of forb is Butterfly Weed which has showy orange flowers that attract thousands of
What type of successional interaction is occurring between these two species?